Should I choose IIT Tirupati mechanical or BITS Hyderabad ECE/EEE? At present, I am getting EEE at BITS, Hyderabad but hoping to get ECE in further literations according to previous cutoff scores.

In the present scenario, EEE is a better choice as compared to Mechanical. Moreover, BITS Hyderabad is better than IIT Tirupati in various aspects. 

The average package for B.Tech Mechanical at IIT Tirupati is 12.30 LPA (for 2023 placements, as of now). The average package for B.Tech EEE at BITS Hyderabad goes higher than that. Moreover, some companies may offer less packages to IIT Tirupati graduates in comparison to BITS graduates, for the same role. 

BITS Hyderabad has a better campus in comparison to IIT Tirupati. The college culture and life is richer at BITS Hyderabad, and even its coding culture is better. You can check the worldwide GSoC college-wise selections. Hyderabad city has ample career opportunities, much more than Tirupati. The startup and entrepreneurial culture of BITS Hyderabad is top notch. 

The students of BITS Hyderabad and Goa get the BITS Pilani tag on their degrees, without any mention of their actual campuses. On the other hand, the ‘IIT tag’ holds significance only for the students of the 7 old IITs. BITS campuses follow 0% attendance requirement policy and MIT pedagogy, while IIT Tirupati follows a strict attendance criteria and IITR pedagogy).

Based on these factors, and many others, I would suggest you to opt for BITS Hyderabad ECE/EEE over a core branch in any of the 2nd or 3rd gen IITs.